VW / Audi 1.8 20vt Map Sensor reading?

**sonicmule** · 07-10-2009, 10:54 AM

Hi there

I'm working on a project for windows mobile that reads the sensor values via an elm327 bluetooth dongle. I've made a boost gauge and wanted to test it out on a mates Seat Ibiza 1.8t as he has a boost gauge fitted. After querying the ecu for supported PIDs, I found that it doesn't support a MAP sensor reading :-(

I've been told its possible to read this using VAG-COM.

Does anybody out there know if Scanguage is capable of reading the MAP sensor PID and what it does to read it?

Cheers

Simon

**p2psmurf** · 07-10-2009, 12:41 PM

If supported you can use pid $43 Absolute Load value.
100% is 1 bar absolute = atmospheric pressure.
200% is 2 bar absolute = 1 bar boost, etc.
According to SAE J1979 this pid must be supported.

**sonicmule** · 07-13-2009, 04:09 AM

Originally Posted by p2psmurf

If supported you can use pid $43 Absolute Load value.
100% is 1 bar absolute = atmospheric pressure.
200% is 2 bar absolute = 1 bar boost, etc.
According to SAE J1979 this pid must be supported.

That's very interesting, where did you find that out?
Seeing as absolute load value goes up to 25,700%, I guess that will do it.
Thanks, I'll give that a go.